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Cover
May 15, 2024
Cover [Abstract]  
Document Type S-3
Amendment Flag false
Entity Registrant Name INTRUSION INC.
Entity Central Index Key 0000736012
Entity Tax Identification Number 75-1911917
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 101 East Park Blvd
Entity Address, Address Line Two Suite 1200
Entity Address, City or Town Plano
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75074
City Area Code (888)
Local Phone Number 637-7770
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company false